Third printing of the first edition, three months after first publication. Illustrated by 19 half-tone illustrations and 11 diagrams, no inscriptions. The original. unclipped dust jacket has some wear at the extremities, protected by a clear, removable cover. A very early printing of this important book. Weysprings Books is a Member of: the IOBA and PBFA, and subscribes to the Associations' Codes of Ethics.